26Aug 2021
Nucleus accumbens microstructure mediates the relationship between obesity and eating behavior in adults

Nucleus accumbens microstructure mediates the relationship between obesity and eating behavior in adults

Objective Basal ganglia regions are part of the brain's reward processing networks and are implicated in the neurobiology of obesity and eating disorders. This study examines basal ganglia microstructural properties in adults with and without obesity. Relationships between basal ganglia DBSI metrics and reward sensitivity and eating behaviors were also explored. Results A total of 46 participants (25 people with obesity; aged 20-40 years; 37 women) were included. Relative to the people in the normal weight group, people with obesity had smaller caudate and larger nucleus accumbens volumes and lower DBSI fiber fraction (reflecting apparent axonal/dendrite density) in NAcc and putamen, higher DBSI nonrestricted fraction in NAcc and caudate, and higher DBSI restricted fraction in putamen. Increased emotional and reward eating behaviors were related to lower...

  • #endo-diabetology

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